The printing speed of line printer is unto:
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Answer: D) 3000 1pm
A Line Printer is a high-speed impact printer that prints one entire line of text at a time instead of printing individual characters.
Its printing speed is measured in LPM (Lines Per Minute). Traditional line printers can operate at speeds of up to approximately 3,000 lines per minute, depending on the model.
Source: Scan #36 page 2 Q279